Explore topic-wise MCQs in Design Steel Structures.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Design Steel Structures knowledge and support exam preparation. Choose a topic below to get started.

1.

The check for design capacity of channel/I-section purlin is given by

A. Mdz ≤ 1.2Zeyfy/γm0, Mdy ≤ 2.4Zezfy/γm0
B. Mdz ≤ Zezfy/γm0, Mdy ≤ 1.2Zeyfy/γm0
C. Mdz ≤ γfZeyfy/γm0, Mdy ≤ 1.2Zezfy/γm0
D. Mdz ≤ 1.2Zezfy/γm0, Mdy ≤ γfZeyfy/γm0
Answer» E.
Discussion
2.

The design capacity of channel/I-section purlin is given by

A. M = Zp/fy
B. M = Zpγm0fy
C. M = Zpγm0/fy
D. M = γm0/fy
Answer» C. M = Zpγm0/fy
Discussion
3.

The required section modulus of the channel/I-section purlin can be determined by

A. Zpz = Myγm0/fy + (b/d)(Mzγm0/fy)
B. Zpz = Mzγm0/fy + (b/d)(Myγm0/fy)
C. Zpz = Mzγm0/fy + 2.5(b/d)(Myγm0/fy)d) Zpz = Myγm0/fy + 2.5(b/
D. (Mzγm0/fy)b) Zpz = Mzγm0/fy + (b/d)(Myγm0/fy)c) Zpz = Mzγm0/fy + 2.5(b/d)(Myγm0/fy)d) Zpz = Myγm0/fy + 2.5(b/d)(Mzγm0/fy)
Answer» D. (Mzγm0/fy)b) Zpz = Mzγm0/fy + (b/d)(Myγm0/fy)c) Zpz = Mzγm0/fy + 2.5(b/d)(Myγm0/fy)d) Zpz = Myγm0/fy + 2.5(b/d)(Mzγm0/fy)
Discussion
4.

The maximum bending moment for design of channel/I-section purlin is calculated by

A. Wl/10, where W= concentrated load
B. Wl/8, where W= concentrated load
C. W/10, where W= concentrated load
D. W/8, where W= concentrated load
Answer» B. Wl/8, where W= concentrated load
Discussion
5.

When one sag rod is used, the moment about web axis

A. reduces by 50%
B. increases by 50%
C. increases by 75%
D. reduces by 75%
Answer» E.
Discussion
6.

THE_MAXIMUM_BENDING_MOMENT_FOR_DESIGN_OF_CHANNEL/I-SECTION_PURLIN_IS_CALCULATED_BY?$

A. Wl/10, where W= concentrated load
B. Wl/8, where W= concentrated load
C. W/10, where W= concentrated load
D. W/8, where W= concentrated load
Answer» B. Wl/8, where W= concentrated load
Discussion
7.

The design capacity of channel/I-section purlin is given by$

A. M = Z<sub>p</sub>/f<sub>y</sub>
B. M = Z<sub>p</sub>γ<sub>m0</sub>f<sub>y</sub>
C. M = Z<sub>p</sub>γ<sub>m0</sub>/f<sub>y</sub>
D. M = γ<sub>m0</sub>/f<sub>y</sub>
Answer» C. M = Z<sub>p</sub>‚âà√≠‚Äö√¢‚Ä¢<sub>m0</sub>/f<sub>y</sub>
Discussion
8.

The_required_section_modulus_of_the_channel/I-section_purlin_can_be_determined_by$

A. Z<sub>pz</sub> = M<sub>y</sub>γ<sub>m0</sub>/f<sub>y</sub> + (b/d)(M<sub>z</sub>γ<sub>m0</sub>/f<sub>y</sub>)
B. Z<sub>pz</sub> = M<sub>z</sub>γ<sub>m0</sub>/f<sub>y</sub> + (b/d)(M<sub>y</sub>γ<sub>m0</sub>/f<sub>y</sub>)
C. Z<sub>pz</sub> = M<sub>z</sub>γ<sub>m0</sub>/f<sub>y</sub> + 2.5(b/d)(M<sub>y</sub>γ<sub>m0</sub>/f<sub>y</sub>)
D. Z<sub>pz</sub> = M<sub>y</sub>γ<sub>m0</sub>/f<sub>y</sub> + 2.5(b/d)(M<sub>z</sub>γ<sub>m0</sub>/f<sub>y</sub>)
Answer» D. Z<sub>pz</sub> = M<sub>y</sub>‚âà√≠‚Äö√¢‚Ä¢<sub>m0</sub>/f<sub>y</sub> + 2.5(b/d)(M<sub>z</sub>‚âà√≠‚Äö√¢‚Ä¢<sub>m0</sub>/f<sub>y</sub>)
Discussion
9.

The modulus of section required for angle section purlin is given by

A. Z = M/(0.66xf<sub>y</sub>)
B. Z = M/(1.33√ó0.66xf<sub>y</sub>)
C. Z = M/(1.33√ó0.66xf<sub>y</sub>)
D. Z = M/(1.33xf<sub>y</sub>)
Answer» D. Z = M/(1.33xf<sub>y</sub>)
Discussion
10.

For which of the following slope of roof truss, angle section purlin can be used?

A. 25Àö
B. 50Àö
C. 75Àö
D. 60Àö
Answer» B. 50‚àö√Ñ‚àö‚àÇ
Discussion
11.

Which of the following relation is correct for design of channel/I-section purlin?

A. (M<sub>z</sub>/M<sub>dz</sub>) + (M<sub>y</sub>/M<sub>dy</sub>) ‚â• 1
B. (M<sub>z</sub>/M<sub>dz</sub>) + (M<sub>y</sub>/M<sub>dy</sub>) ≤ 1
C. (M<sub>dz</sub>/M<sub>z</sub>) + (M<sub>y</sub>/M<sub>dy</sub>) ≤ 1
D. (M<sub>dz</sub>/M<sub>z</sub>) + (M<sub>dy</sub>/M<sub>y</sub>) ‚â• 1
Answer» C. (M<sub>dz</sub>/M<sub>z</sub>) + (M<sub>y</sub>/M<sub>dy</sub>) ‚Äö√Ñ√∂‚àö¬¢¬¨√ü 1
Discussion
12.

The_check_for_design_capacity_of_channel/I-section_purlin_is_given_by

A. M<sub>dz</sub> ≤ 1.2Z<sub>ey</sub>f<sub>y</sub>/γ<sub>m0</sub>, M<sub>dy</sub> ≤ 2.4Z<sub>ez</sub>f<sub>y</sub>/γ<sub>m0</sub>
B. M<sub>dz</sub> ≤ Z<sub>ez</sub>f<sub>y</sub>/γ<sub>m0</sub>, M<sub>dy</sub> ≤ 1.2Z<sub>ey</sub>f<sub>y</sub>/γ<sub>m0</sub>
C. M<sub>dz</sub> ≤ γfZ<sub>ey</sub>f<sub>y</sub>/γ<sub>m0</sub>, M<sub>dy</sub> ≤ 1.2Z<sub>ez</sub>f<sub>y</sub>/γ<sub>m0</sub>
D. M<sub>dz</sub> ≤ 1.2Z<sub>ez</sub>f<sub>y</sub>/γ<sub>m0</sub>, M<sub>dy</sub> ≤ γfZ<sub>ey</sub>f<sub>y</sub>/γ<sub>m0</sub>
Answer» E.
Discussion
13.

When one sag rod is used, the moment about web axi?

A. reduces by 50%
B. increases by 50%
C. increases by 75%
D. reduces by 75%
Answer» E.
Discussion
14.

Which of the following is not true about sag rods?

A. sag rods are provided at midway or at one-third points between roof trusses
B. these rods reduce the moment M<sub>yy</sub>
C. these rods increase the moment M<sub>yy</sub>
D. these rods result in smaller purlin sections
Answer» D. these rods result in smaller purlin sections
Discussion
15.

Sag rods are provided at

A. one-third points between roof trusses
B. end of span
C. two-third points between roof trusses
D. are never provided
Answer» B. end of span
Discussion
16.

While erecting channel section purlins, it is desirable that they are erected over rafter with their flange

A. facing down slope
B. facing up slope
C. does not depend whether up slope or down slope
D. flanges are placed randomly
Answer» C. does not depend whether up slope or down slope
Discussion
17.

If purlins are assumed to be simply supported, the moments will be

A. wl<sup>2</sup>/10
B. wl/8
C. wl/10
D. wl<sup>2</sup>/8
Answer» E.
Discussion
18.

Purlin section is subjected to

A. not subjected to bending or twisting
B. twisting only
C. symmetrical bending
D. unsymmetrical bending
Answer» E.
Discussion
19.

Theoretically, purlins are generally placed at

A. only at panel points
B. only at edges
C. only at mid span
D. only at corners of roof
Answer» B. only at edges
Discussion
20.

What are purlins?

A. beams provided in foundation
B. beams provided above openings
C. beams provided over trusses to support roofing
D. beams provided on plinth level
Answer» D. beams provided on plinth level
Discussion